Easy Blueberry Bars

Featured in Sweet Treats Worth the Calories.

These Blueberry Bars have a crumbly oat crust and sugary berry middle. Combine oats, flour, and sugar for the base, layer with coated blueberries, and top with more crumble. Bake until golden and bubbling, ready in 50 minutes. Easily customizable for gluten-free options using special flour and oats. Works with fresh or frozen berries.
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Updated on Thu, 27 Mar 2025 22:26:50 GMT
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These breakfast bars blend juicy blueberries with hearty oats for a truly satisfying morning treat. The soft base holds sweet berries while the crunchy top gives you that amazing texture difference everyone loves.

Must-Have Ingredients

  • Old-fashioned oats: Gives that wonderful chewy bite
  • All-purpose flour: Makes the base nice and soft
  • Brown sugar: Brings moisture and sweet caramel flavor
  • Butter: Go for European-style for richer taste
  • Fresh blueberries: Try wild ones for bigger flavor punch
  • Cornstarch: Helps berry juice thicken up
  • Vanilla: Get pure extract for best results
  • Cinnamon: Adds that cozy spice touch

Instructions

Oven Preparation
Put your rack in the middle. Heat to 375°F. Line your pan with parchment and leave some hanging over the sides.
Base Mixture
Mix your oats, flour, brown sugar, baking soda and salt in a big bowl. Stir it all up good.
Butter Integration
Drizzle your melted butter and vanilla over everything dry. Mix until it looks crumbly.
Bottom Layer
Push half your mixture down hard into your lined pan. Make sure it's the same thickness everywhere.
Berry Layer
Toss blueberries with sugar and cornstarch. Spread them evenly on your base.
Crumble Topping
Scatter the rest of your oat mix over the berries. Press down lightly so it sticks.
Baking Process
Cook for 35-40 minutes until it looks golden and you see bubbling berries.
Cooling Period
Let it cool all the way in the pan. Use the parchment to lift it out. Cut with a sharp knife.
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Kitchen Tips

Use parchment with the non-stick side down, try dental floss for clean cuts, stick a toothpick in to check if it's done, and turn your pan around halfway through baking.

Storage Solutions

They'll last 3 days on your counter, a week in your fridge, or 3 months frozen. Just let them thaw overnight in the fridge.

Nutritional Benefits

The oats pack lots of fiber for good digestion, blueberries give you antioxidants, whole grains keep your energy up, and you get natural sweetness from the fruit.

Seasonal Adaptations

Try mixed berries with lemon zest in summer, chunks of apple with extra cinnamon for fall, dried cranberries during winter, and fresh strawberries in spring.

Perfect Pairing Ideas

For breakfast, eat with Greek yogurt. As a snack, wash down with almond milk. Make it dessert with vanilla ice cream on top. At brunch, serve alongside a fruit smoothie.

Family Stories

We always take these bars camping with us now. They don't fall apart and travel so well on the trail.

Additional Benefits

You can make them ahead of time, adjust how sweet they are, take them anywhere, and they cost way less than store-bought snacks.

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Here's proof that good-for-you can taste amazing too - just what busy families need when they want something nutritious that actually tastes good.

Frequently Asked Questions

→ Is it okay to use frozen blueberries?
Yep! Frozen ones work perfectly, no defrosting needed.
→ What's the best way to store them?
Keep them in a sealed container at room temperature for 3 days or in the fridge for up to a week.
→ Can I make them without gluten?
Sure! Just swap in gluten-free oats and flour. Use a 1:1 gluten-free flour too.
→ Can I switch the fruit out?
Totally! Try it with raspberries, blackberries, or chopped strawberries.
→ How do I freeze them?
Wrap them up tightly and freeze for up to 3 months. Let them thaw in the fridge overnight.

Blueberry Oatmeal Bars

Sweet blueberries between buttery crusts, wonderful for dessert or snacking.

Prep Time
15 Minutes
Cook Time
40 Minutes
Total Time
55 Minutes
By: Milly

Category: Desserts

Difficulty: Intermediate

Cuisine: American

Yield: 16 Servings (16 bars)

Dietary: Vegetarian

Ingredients

→ Dry Base

01 1/2 teaspoon cinnamon
02 3/4 cup all-purpose flour
03 1 cup old-fashioned oats
04 1/3 cup light brown sugar
05 1/4 teaspoon salt
06 1/4 teaspoon baking soda

→ Wet Ingredients

07 1 teaspoon vanilla extract
08 6 tablespoons unsalted butter, melted

→ Filling

09 1 cup blueberries
10 2 teaspoons cornstarch
11 1/4 cup granulated sugar

Instructions

Step 01

Preheat your oven to 375°F (190°C). Line an 8-inch square pan with parchment paper, leaving a bit extra hanging over the edges so it’s easier to lift out later.

Step 02

In a bowl, mix oats, flour, cinnamon, brown sugar, baking soda, and salt. Drizzle in the melted butter and vanilla, stirring until everything comes together in a crumbly texture.

Step 03

Press half your crumbly mixture tightly into the pan’s bottom, smoothing it out so it’s packed evenly.

Step 04

Coat the blueberries in the sugar and cornstarch combo by tossing them together until everything’s combined. Spread this fruity layer on top of the pressed crumb base.

Step 05

Sprinkle the rest of the oat mixture over the fruit, pressing gently to help it stay in place.

Step 06

Bake in your preheated oven for about 35-40 minutes, or until the top is golden and the blueberry layer is bubbling. Let it completely cool down before carefully lifting it out by the parchment paper and cutting it into squares.

Notes

  1. Mix in some lemon zest with the blueberries for a zingy flavor twist.
  2. Swap some of the oats for almond meal to get an extra crispy texture.
  3. Store in a sealed container at room temp for up to five days.

Tools You'll Need

  • Mixing bowls
  • 8-inch square baking pan
  • Parchment paper
  • Measuring cups and spoons

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Wheat
  • Dairy

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 180
  • Total Fat: 8 g
  • Total Carbohydrate: 25 g
  • Protein: 2 g